Isaac and the Black Sword Knights are responsible for training the Maihama army. While he's in Maihama Isaac gets to know the new crown prince of Maihama, a young boy named Iselus.  Iselus respect looks up to Isaac and respects him.
At a party for the crown prince's birthday, assassin's make an attempt on his life.
But there is an uncertainty within him.
und verbirgt dabei eine gewisse
Unsicherheit in seinem Herzen.
Pero hay incertidumbre en su interior.
Cependant,
un doute plane dans son cœur…
ma in cuor suo è indeciso.
Mas há uma incerteza dentro dele.
Но в его сердце таится неуверенность.